氨法选择性催化还原技术在硝酸尾气治理中的应用  

Application of selective catalytic reduction by ammonia process in nitric acid tail gas treatment

作　　者：刘家荣[1] 

机构地区：[1]中国石化集团南京化学工业有限公司,江苏南京210048

出　　处：《硫酸工业》2017年第7期46-48,56,共4页Sulphuric Acid Industry

摘　　要：介绍了氨法选择性催化还原技术在南化公司105 kt/a和270 kt/a稀硝酸装置尾气处理中的应用。2套硝酸装置尾气治理装置主要由1台氨蒸发器、1台氨气缓冲罐和2台脱硝反应器组成。其操作条件为氨蒸发器温度为80~90℃,氨缓冲罐气氨压力为0.9~1.2 MPa,脱硝反应器压力降低于7.0 k Pa。处理后的硝酸尾气中NOx质量浓度小于100 mg/m^3,甚至低于50 mg/m^3,逃逸氨质量浓度低于2.5 mg/m^3,满足国家和地方标准。Application of selective catalytic reduction by ammonia process in treating nitric acid tail gas from 105 kt/a and 270 kt/a dilute nitric acid plant of Nanjing Chemical Industry Co. is introduced. Two dilute nitric acid tail gas treatment plants consisted of an ammonia evaporator,an ammonia gas buffer tank,and two denitrification reactor. The operation condition was that temperature of ammonia evaporator was 80-90 ℃,ammonia pressure in buffer tank was 0. 9-1. 2 MPa,pressure drop in denitrification reactor was less than 7. 0 kPa. Concentration of NOxin treated tail gas was less than 100 mg/m^3,and even less than 50 mg/m^3,that of escaped ammonia was below 2. 5 mg/m^3,meeting national and provincial standards.

关 键 词：硝酸尾气 选择性催化还原技术 脱硝 氮氧化物 

分 类 号：O643.3[理学—物理化学] X78[理学—化学]